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https://issues.apache.org/jira/browse/YARN-2047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14998572#comment-14998572
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Jun Gong commented on YARN-2047:
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I am not sure why AM cannot be trusted, but information about running
containers could be regarded as a reference, and they are only used for
specific usage described above.
> RM should honor NM heartbeat expiry after RM restart
> ----------------------------------------------------
>
> Key: YARN-2047
> URL: https://issues.apache.org/jira/browse/YARN-2047
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Bikas Saha
>
> After the RM restarts, it forgets about existing NM's (and their potentially
> decommissioned status too). After restart, the RM cannot maintain the
> contract to the AM's that a lost NM's containers will be marked finished
> within the expiry time.
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